Pioneer Energy Services Corp., through its subsidiaries, provides contract land drilling services and production services to independent and oil and gas exploration and production companies in the United States and Colombia. Its Drilling Services segment provides contract land drilling services to a group of oil and gas exploration and production companies with its fleet of 66 drilling rigs in Texas, North Dakota, Utah, Appalachia, and Colombia. The company’s Production Services segment provides a range of services to exploration and production companies, including well servicing, wireline services, coiled tubing services, and fishing and rental services. It provides its production services in the United States onshore oil and gas producing regions in the Mid-Continent and Rocky Mountain states; and in the onshore and offshore Gulf Coast. As of July 20, 2012, the company had a fleet of 101 well servicing rigs, 117 wireline units, and 11 coiled tubing units. The company was formerly known as Pioneer Drilling Company and changed its name to Pioneer Energy Services Corp. in July 2012. Pioneer Energy Services Corp. was founded in 1968 and is based in San Antonio, Texas.